tracking and counting

i need to create a simulink model for tracking and counter no of people entering the room using camera. my problem is i can not counter down the people in my system...any body can help me...

[Prasad Kalane]

if you are using 2012b or 2013a or 2013b , then it contain some examples, go through that,they might be helpful... type in command window

>> viptrackpeople.mdl

>> multiObjectTracking()

[AVINASH]

Can you please share the code to count the people who are entering the room say up count over here.